ThinkRail from JetBrains
JetBrains has introduced ThinkRail, an agentic IDE designed to manage multiple parallel coding tasks using git worktrees. The tool integrates a spec-first approach to maintain project intent across different agent-driven workspaces.
Why it matters
This represents a significant shift in developer tooling, moving toward autonomous agents that manage complex, multi-branch workflows.
JetBrains InnovationHub Apache-2.0 open source
The agentic IDE that gets better every time you use it.
Open a repo as a project. Cut isolated git-worktree workspaces . Pair with a real agent across Monaco tabs, terminals, and diffs — while your project's intent lives in a spec graph the agent actually reads .
ThinkRail runs on macOS, Windows, and Linux.
Install the local launcher; run thinkrail to open the browser UI.
Every workspace is a real git worktree — its own branch, its own cwd. Run several agents in parallel; each one's mess stays on its branch, and main stays clean until you say otherwise.
ThinkRail is built spec-first, and so are your projects: a connected graph of spec files lives beside the code, and the agent reads, searches, and maintains it with dedicated tools. Intent survives the session.
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